gcc/config/avr/avr.h

   1 /* Definitions of target machine for GNU compiler,
   2    for ATMEL AVR at90s8515, ATmega103/103L, ATmega603/603L microcontrollers.
   3    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   4    2008, 2009, 2010, 2011
   5    Free Software Foundation, Inc.
   6    Contributed by Denis Chertykov (chertykov@gmail.com)
   7
   8 This file is part of GCC.
   9
  10 GCC is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 3, or (at your option)
  13 any later version.
  14
  15 GCC is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GCC; see the file COPYING3.  If not see
  22 <http://www.gnu.org/licenses/>.  */
  23
  24 /* Names to predefine in the preprocessor for this target machine.  */
  25
  26 struct base_arch_s {
  27   /* Assembler only.  */
  28   int asm_only;
  29
  30   /* Core have 'MUL*' instructions.  */
  31   int have_mul;
  32
  33   /* Core have 'CALL' and 'JMP' instructions.  */
  34   int have_jmp_call;
  35
  36   /* Core have 'MOVW' and 'LPM Rx,Z' instructions.  */
  37   int have_movw_lpmx;
  38
  39   /* Core have 'ELPM' instructions.  */
  40   int have_elpm;
  41
  42   /* Core have 'ELPM Rx,Z' instructions.  */
  43   int have_elpmx;
  44
  45   /* Core have 'EICALL' and 'EIJMP' instructions.  */
  46   int have_eijmp_eicall;
  47
  48   /* Reserved for xmega architecture.  */
  49   int reserved;
  50
  51   /* Reserved for xmega architecture.  */
  52   int reserved2;
  53
  54   /* Default start of data section address for architecture.  */
  55   int default_data_section_start;
  56
  57   const char *const macro;
  58
  59   /* Architecture name.  */
  60   const char *const arch_name;
  61 };
  62
  63 /* These names are used as the index into the avr_arch_types[] table
  64    above.  */
  65
  66 enum avr_arch
  67 {
  68   ARCH_UNKNOWN,
  69   ARCH_AVR1,
  70   ARCH_AVR2,
  71   ARCH_AVR25,
  72   ARCH_AVR3,
  73   ARCH_AVR31,
  74   ARCH_AVR35,
  75   ARCH_AVR4,
  76   ARCH_AVR5,
  77   ARCH_AVR51,
  78   ARCH_AVR6
  79 };
  80
  81 struct mcu_type_s {
  82   /* Device name.  */
  83   const char *const name;
  84
  85   /* Index in avr_arch_types[].  */
  86   int arch;
  87
  88   /* Must lie outside user's namespace.  NULL == no macro.  */
  89   const char *const macro;
  90
  91   /* Stack pointer have 8 bits width.  */
  92   int short_sp;
  93
  94   /* Start of data section.  */
  95   int data_section_start;
  96
  97   /* Name of device library.  */
  98   const char *const library_name;
  99 };
 100
 101 /* Preprocessor macros to define depending on MCU type.  */
 102 extern const char *avr_extra_arch_macro;
 103 extern const struct base_arch_s *avr_current_arch;
 104 extern const struct mcu_type_s *avr_current_device;
 105 extern const struct mcu_type_s avr_mcu_types[];
 106 extern const struct base_arch_s avr_arch_types[];
 107
 108 #define TARGET_CPU_CPP_BUILTINS()       avr_cpu_cpp_builtins (pfile)
 109
 110 #if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS)
 111 extern GTY(()) section *progmem_section;
 112 #endif
 113
 114 #define AVR_HAVE_JMP_CALL (avr_current_arch->have_jmp_call && !TARGET_SHORT_CALLS)
 115 #define AVR_HAVE_MUL (avr_current_arch->have_mul)
 116 #define AVR_HAVE_MOVW (avr_current_arch->have_movw_lpmx)
 117 #define AVR_HAVE_LPMX (avr_current_arch->have_movw_lpmx)
 118 #define AVR_HAVE_RAMPZ (avr_current_arch->have_elpm)
 119 #define AVR_HAVE_EIJMP_EICALL (avr_current_arch->have_eijmp_eicall)
 120 #define AVR_HAVE_8BIT_SP (avr_current_device->short_sp || TARGET_TINY_STACK)
 121
 122 #define AVR_2_BYTE_PC (!AVR_HAVE_EIJMP_EICALL)
 123 #define AVR_3_BYTE_PC (AVR_HAVE_EIJMP_EICALL)
 124
 125 #define BITS_BIG_ENDIAN 0
 126 #define BYTES_BIG_ENDIAN 0
 127 #define WORDS_BIG_ENDIAN 0
 128
 129 #ifdef IN_LIBGCC2
 130 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits).  */
 131 #define UNITS_PER_WORD 4
 132 #else
 133 /* Width of a word, in units (bytes).  */
 134 #define UNITS_PER_WORD 1
 135 #endif
 136
 137 #define POINTER_SIZE 16
 138
 139
 140 /* Maximum sized of reasonable data type
 141    DImode or Dfmode ...  */
 142 #define MAX_FIXED_MODE_SIZE 32
 143
 144 #define PARM_BOUNDARY 8
 145
 146 #define FUNCTION_BOUNDARY 8
 147
 148 #define EMPTY_FIELD_BOUNDARY 8
 149
 150 /* No data type wants to be aligned rounder than this.  */
 151 #define BIGGEST_ALIGNMENT 8
 152
 153 #define MAX_OFILE_ALIGNMENT (32768 * 8)
 154
 155 #define TARGET_VTABLE_ENTRY_ALIGN 8
 156
 157 #define STRICT_ALIGNMENT 0
 158
 159 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
 160 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
 161 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
 162 #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
 163 #define FLOAT_TYPE_SIZE 32
 164 #define DOUBLE_TYPE_SIZE 32
 165 #define LONG_DOUBLE_TYPE_SIZE 32
 166
 167 #define DEFAULT_SIGNED_CHAR 1
 168
 169 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
 170 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
 171
 172 #define WCHAR_TYPE_SIZE 16
 173
 174 #define FIRST_PSEUDO_REGISTER 36
 175
 176 #define FIXED_REGISTERS {\
 177   1,1,/* r0 r1 */\
 178   0,0,/* r2 r3 */\
 179   0,0,/* r4 r5 */\
 180   0,0,/* r6 r7 */\
 181   0,0,/* r8 r9 */\
 182   0,0,/* r10 r11 */\
 183   0,0,/* r12 r13 */\
 184   0,0,/* r14 r15 */\
 185   0,0,/* r16 r17 */\
 186   0,0,/* r18 r19 */\
 187   0,0,/* r20 r21 */\
 188   0,0,/* r22 r23 */\
 189   0,0,/* r24 r25 */\
 190   0,0,/* r26 r27 */\
 191   0,0,/* r28 r29 */\
 192   0,0,/* r30 r31 */\
 193   1,1,/*  STACK */\
 194   1,1 /* arg pointer */  }
 195
 196 #define CALL_USED_REGISTERS {                   \
 197   1,1,/* r0 r1 */                               \
 198     0,0,/* r2 r3 */                             \
 199     0,0,/* r4 r5 */                             \
 200     0,0,/* r6 r7 */                             \
 201     0,0,/* r8 r9 */                             \
 202     0,0,/* r10 r11 */                           \
 203     0,0,/* r12 r13 */                           \
 204     0,0,/* r14 r15 */                           \
 205     0,0,/* r16 r17 */                           \
 206     1,1,/* r18 r19 */                           \
 207     1,1,/* r20 r21 */                           \
 208     1,1,/* r22 r23 */                           \
 209     1,1,/* r24 r25 */                           \
 210     1,1,/* r26 r27 */                           \
 211     0,0,/* r28 r29 */                           \
 212     1,1,/* r30 r31 */                           \
 213     1,1,/*  STACK */                            \
 214     1,1 /* arg pointer */  }
 215
 216 #define REG_ALLOC_ORDER {                       \
 217     24,25,                                      \
 218     18,19,                                      \
 219     20,21,                                      \
 220     22,23,                                      \
 221     30,31,                                      \
 222     26,27,                                      \
 223     28,29,                                      \
 224     17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,    \
 225     0,1,                                        \
 226     32,33,34,35                                 \
 227     }
 228
 229 #define ADJUST_REG_ALLOC_ORDER order_regs_for_local_alloc ()
 230
 231
 232 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 233
 234 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 235
 236 #define MODES_TIEABLE_P(MODE1, MODE2) 1
 237
 238 enum reg_class {
 239   NO_REGS,
 240   R0_REG,                       /* r0 */
 241   POINTER_X_REGS,               /* r26 - r27 */
 242   POINTER_Y_REGS,               /* r28 - r29 */
 243   POINTER_Z_REGS,               /* r30 - r31 */
 244   STACK_REG,                    /* STACK */
 245   BASE_POINTER_REGS,            /* r28 - r31 */
 246   POINTER_REGS,                 /* r26 - r31 */
 247   ADDW_REGS,                    /* r24 - r31 */
 248   SIMPLE_LD_REGS,               /* r16 - r23 */
 249   LD_REGS,                      /* r16 - r31 */
 250   NO_LD_REGS,                   /* r0 - r15 */
 251   GENERAL_REGS,                 /* r0 - r31 */
 252   ALL_REGS, LIM_REG_CLASSES
 253 };
 254
 255
 256 #define N_REG_CLASSES (int)LIM_REG_CLASSES
 257
 258 #define REG_CLASS_NAMES {                                       \
 259                  "NO_REGS",                                     \
 260                    "R0_REG",    /* r0 */                        \
 261                    "POINTER_X_REGS", /* r26 - r27 */            \
 262                    "POINTER_Y_REGS", /* r28 - r29 */            \
 263                    "POINTER_Z_REGS", /* r30 - r31 */            \
 264                    "STACK_REG", /* STACK */                     \
 265                    "BASE_POINTER_REGS", /* r28 - r31 */         \
 266                    "POINTER_REGS", /* r26 - r31 */              \
 267                    "ADDW_REGS", /* r24 - r31 */                 \
 268                    "SIMPLE_LD_REGS", /* r16 - r23 */            \
 269                    "LD_REGS",   /* r16 - r31 */                 \
 270                    "NO_LD_REGS", /* r0 - r15 */                 \
 271                    "GENERAL_REGS", /* r0 - r31 */               \
 272                    "ALL_REGS" }
 273
 274 #define REG_CLASS_CONTENTS {                                            \
 275   {0x00000000,0x00000000},      /* NO_REGS */                           \
 276   {0x00000001,0x00000000},      /* R0_REG */                            \
 277   {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */         \
 278   {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */         \
 279   {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */         \
 280   {0x00000000,0x00000003},      /* STACK_REG, STACK */                  \
 281   {(3 << REG_Y) | (3 << REG_Z),                                         \
 282      0x00000000},               /* BASE_POINTER_REGS, r28 - r31 */      \
 283   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),                          \
 284      0x00000000},               /* POINTER_REGS, r26 - r31 */           \
 285   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),           \
 286      0x00000000},               /* ADDW_REGS, r24 - r31 */              \
 287   {0x00ff0000,0x00000000},      /* SIMPLE_LD_REGS r16 - r23 */          \
 288   {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),    \
 289      0x00000000},       /* LD_REGS, r16 - r31 */                        \
 290   {0x0000ffff,0x00000000},      /* NO_LD_REGS  r0 - r15 */              \
 291   {0xffffffff,0x00000000},      /* GENERAL_REGS, r0 - r31 */            \
 292   {0xffffffff,0x00000003}       /* ALL_REGS */                          \
 293 }
 294
 295 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
 296
 297 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
 298
 299 #define INDEX_REG_CLASS NO_REGS
 300
 301 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER            \
 302                                  && ((r) == REG_X                       \
 303                                      || (r) == REG_Y                    \
 304                                      || (r) == REG_Z                    \
 305                                      || (r) == ARG_POINTER_REGNUM))     \
 306                                 || (reg_renumber                        \
 307                                     && (reg_renumber[r] == REG_X        \
 308                                         || reg_renumber[r] == REG_Y     \
 309                                         || reg_renumber[r] == REG_Z     \
 310                                         || (reg_renumber[r]             \
 311                                             == ARG_POINTER_REGNUM))))
 312
 313 #define REGNO_OK_FOR_INDEX_P(NUM) 0
 314
 315 #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true
 316
 317 #define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)
 318
 319 #define STACK_PUSH_CODE POST_DEC
 320
 321 #define STACK_GROWS_DOWNWARD
 322
 323 #define STARTING_FRAME_OFFSET 1
 324
 325 #define STACK_POINTER_OFFSET 1
 326
 327 #define FIRST_PARM_OFFSET(FUNDECL) 0
 328
 329 #define STACK_BOUNDARY 8
 330
 331 #define STACK_POINTER_REGNUM 32
 332
 333 #define FRAME_POINTER_REGNUM REG_Y
 334
 335 #define ARG_POINTER_REGNUM 34
 336
 337 #define STATIC_CHAIN_REGNUM 2
 338
 339 #define ELIMINABLE_REGS {                                       \
 340       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 341         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 342        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 343
 344 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 345   OFFSET = avr_initial_elimination_offset (FROM, TO)
 346
 347 #define RETURN_ADDR_RTX(count, tem) avr_return_addr_rtx (count, tem)
 348
 349 /* Don't use Push rounding. expr.c: emit_single_push_insn is broken
 350    for POST_DEC targets (PR27386).  */
 351 /*#define PUSH_ROUNDING(NPUSHED) (NPUSHED)*/
 352
 353 typedef struct avr_args {
 354   int nregs;                    /* # registers available for passing */
 355   int regno;                    /* next available register number */
 356 } CUMULATIVE_ARGS;
 357
 358 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 359   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 360
 361 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 362
 363 extern int avr_reg_order[];
 364
 365 #define DEFAULT_PCC_STRUCT_RETURN 0
 366
 367 #define EPILOGUE_USES(REGNO) avr_epilogue_uses(REGNO)
 368
 369 #define HAVE_POST_INCREMENT 1
 370 #define HAVE_PRE_DECREMENT 1
 371
 372 #define MAX_REGS_PER_ADDRESS 1
 373
 374 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 375   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 376
 377 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 378
 379 /* LEGITIMIZE_RELOAD_ADDRESS will allow register R26/27 to be used, where it
 380    is no worse than normal base pointers R28/29 and R30/31. For example:
 381    If base offset is greater than 63 bytes or for R++ or --R addressing.  */
 382
 383 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 384 do {                                                                        \
 385   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 386     {                                                                       \
 387       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 388                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 389                    OPNUM, RELOAD_OTHER);                                    \
 390       goto WIN;                                                             \
 391     }                                                                       \
 392   if (GET_CODE (X) == PLUS                                                  \
 393       && REG_P (XEXP (X, 0))                                                \
 394       && (reg_equiv_constant (REGNO (XEXP (X, 0))) == 0)                    \
 395       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 396       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 397     {                                                                       \
 398       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 399       if (fit)                                                              \
 400         {                                                                   \
 401           if (reg_equiv_address (REGNO (XEXP (X, 0))) != 0)                 \
 402             {                                                               \
 403               int regno = REGNO (XEXP (X, 0));                              \
 404               rtx mem = make_memloc (X, regno);                             \
 405               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 406                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 407                            1, ADDR_TYPE (TYPE));                            \
 408               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 409                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 410                            OPNUM, TYPE);                                    \
 411               goto WIN;                                                     \
 412             }                                                               \
 413         }                                                                   \
 414       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 415         {                                                                   \
 416           push_reload (X, NULL_RTX, &X, NULL,                               \
 417                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 418                        OPNUM, TYPE);                                        \
 419           goto WIN;                                                         \
 420         }                                                                   \
 421     }                                                                       \
 422 } while(0)
 423
 424 #define LEGITIMATE_CONSTANT_P(X) 1
 425
 426 #define BRANCH_COST(speed_p, predictable_p) 0
 427
 428 #define SLOW_BYTE_ACCESS 0
 429
 430 #define NO_FUNCTION_CSE
 431
 432 #define TEXT_SECTION_ASM_OP "\t.text"
 433
 434 #define DATA_SECTION_ASM_OP "\t.data"
 435
 436 #define BSS_SECTION_ASM_OP "\t.section .bss"
 437
 438 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 439    There are no shared libraries on this target, and these sections are
 440    placed in the read-only program memory, so they are not writable.  */
 441
 442 #undef CTORS_SECTION_ASM_OP
 443 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 444
 445 #undef DTORS_SECTION_ASM_OP
 446 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 447
 448 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 449
 450 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 451
 452 #define SUPPORTS_INIT_PRIORITY 0
 453
 454 #define JUMP_TABLES_IN_TEXT_SECTION 0
 455
 456 #define ASM_COMMENT_START " ; "
 457
 458 #define ASM_APP_ON "/* #APP */\n"
 459
 460 #define ASM_APP_OFF "/* #NOAPP */\n"
 461
 462 /* Switch into a generic section.  */
 463 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 464 #define TARGET_ASM_INIT_SECTIONS avr_asm_init_sections
 465
 466 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 467
 468 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == '\n' || ((C) == '$'))
 469
 470 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 471 do {                                                                       \
 472      fputs ("\t.comm ", (STREAM));                                         \
 473      assemble_name ((STREAM), (NAME));                                     \
 474      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 475 } while (0)
 476
 477 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 478   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 479
 480 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 481 do {                                                                    \
 482      fputs ("\t.lcomm ", (STREAM));                                     \
 483      assemble_name ((STREAM), (NAME));                                  \
 484      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 485 } while (0)
 486
 487 #undef TYPE_ASM_OP
 488 #undef SIZE_ASM_OP
 489 #undef WEAK_ASM_OP
 490 #define TYPE_ASM_OP     "\t.type\t"
 491 #define SIZE_ASM_OP     "\t.size\t"
 492 #define WEAK_ASM_OP     "\t.weak\t"
 493 /* Define the strings used for the special svr4 .type and .size directives.
 494    These strings generally do not vary from one system running svr4 to
 495    another, but if a given system (e.g. m88k running svr) needs to use
 496    different pseudo-op names for these, they may be overridden in the
 497    file which includes this one.  */
 498
 499
 500 #undef TYPE_OPERAND_FMT
 501 #define TYPE_OPERAND_FMT        "@%s"
 502 /* The following macro defines the format used to output the second
 503    operand of the .type assembler directive.  Different svr4 assemblers
 504    expect various different forms for this operand.  The one given here
 505    is just a default.  You may need to override it in your machine-
 506    specific tm.h file (depending upon the particulars of your assembler).  */
 507
 508 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 509 avr_asm_declare_function_name ((FILE), (NAME), (DECL))
 510
 511 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 512   do {                                                                  \
 513     if (!flag_inhibit_size_directive)                                   \
 514       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 515   } while (0)
 516
 517 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 518 do {                                                                    \
 519   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 520   size_directive_output = 0;                                            \
 521   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 522     {                                                                   \
 523       size_directive_output = 1;                                        \
 524       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 525                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 526     }                                                                   \
 527   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 528 } while (0)
 529
 530 #undef ASM_FINISH_DECLARE_OBJECT
 531 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 532 do {                                                                     \
 533      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 534      HOST_WIDE_INT size;                                                 \
 535      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 536          && ! AT_END && TOP_LEVEL                                        \
 537          && DECL_INITIAL (DECL) == error_mark_node                       \
 538          && !size_directive_output)                                      \
 539        {                                                                 \
 540          size_directive_output = 1;                                      \
 541          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 542          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 543        }                                                                 \
 544    } while (0)
 545
 546
 547 #define ESCAPES \
 548 "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 549 \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 550 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
 551 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
 552 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 553 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 554 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 555 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
 556 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 557    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 558    corresponds to a particular byte value [0..255].  For any
 559    given byte value, if the value in the corresponding table
 560    position is zero, the given character can be output directly.
 561    If the table value is 1, the byte must be output as a \ooo
 562    octal escape.  If the tables value is anything else, then the
 563    byte value should be output as a \ followed by the value
 564    in the table.  Note that we can use standard UN*X escape
 565    sequences for many control characters, but we don't use
 566    \a to represent BEL because some svr4 assemblers (e.g. on
 567    the i386) don't know about that.  Also, we don't use \v
 568    since some versions of gas, such as 2.2 did not accept it.  */
 569
 570 #define STRING_LIMIT    ((unsigned) 64)
 571 #define STRING_ASM_OP   "\t.string\t"
 572 /* Some svr4 assemblers have a limit on the number of characters which
 573    can appear in the operand of a .string directive.  If your assembler
 574    has such a limitation, you should define STRING_LIMIT to reflect that
 575    limit.  Note that at least some svr4 assemblers have a limit on the
 576    actual number of bytes in the double-quoted string, and that they
 577    count each character in an escape sequence as one byte.  Thus, an
 578    escape sequence like \377 would count as four bytes.
 579
 580    If your target assembler doesn't support the .string directive, you
 581    should define this to zero.  */
 582
 583 /* Globalizing directive for a label.  */
 584 #define GLOBAL_ASM_OP ".global\t"
 585
 586 #define SET_ASM_OP      "\t.set\t"
 587
 588 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 589   do                                    \
 590     {                                   \
 591       fputs ("\t.weak\t", (FILE));      \
 592       assemble_name ((FILE), (NAME));   \
 593       fputc ('\n', (FILE));             \
 594     }                                   \
 595   while (0)
 596
 597 #define SUPPORTS_WEAK 1
 598
 599 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 600 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 601
 602 #define HAS_INIT_SECTION 1
 603
 604 #define REGISTER_NAMES {                                \
 605   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 606     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 607     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 608     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 609     "__SP_L__","__SP_H__","argL","argH"}
 610
 611 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 612
 613 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 614
 615 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~' || (CODE) == '!')
 616
 617 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 618
 619 #define USER_LABEL_PREFIX ""
 620
 621 #define ASSEMBLER_DIALECT AVR_HAVE_MOVW
 622
 623 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 624 {                                               \
 625   gcc_assert (REGNO < 32);                      \
 626   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 627 }
 628
 629 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 630 {                                               \
 631   gcc_assert (REGNO < 32);                      \
 632   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 633 }
 634
 635 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 636   avr_output_addr_vec_elt(STREAM, VALUE)
 637
 638 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 639   (switch_to_section (progmem_section), \
 640    (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM))
 641
 642 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 643 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 644
 645 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 646   do {                                                  \
 647       if ((POWER) > 1)                                  \
 648           fprintf (STREAM, "\t.p2align\t%d\n", POWER);  \
 649   } while (0)
 650
 651 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
 652   default_elf_asm_output_external (FILE, DECL, NAME)
 653
 654 #define CASE_VECTOR_MODE HImode
 655
 656 #undef WORD_REGISTER_OPERATIONS
 657
 658 #define MOVE_MAX 4
 659
 660 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 661
 662 #define Pmode HImode
 663
 664 #define FUNCTION_MODE HImode
 665
 666 #define DOLLARS_IN_IDENTIFIERS 0
 667
 668 #define NO_DOLLAR_IN_LABEL 1
 669
 670 #define TRAMPOLINE_SIZE 4
 671
 672 /* Store in cc_status the expressions
 673    that the condition codes will describe
 674    after execution of an instruction whose pattern is EXP.
 675    Do not alter them if the instruction would not alter the cc's.  */
 676
 677 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 678
 679 /* The add insns don't set overflow in a usable way.  */
 680 #define CC_OVERFLOW_UNUSABLE 01000
 681 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 682    Z bit is all we need when doing unsigned comparisons on the result of
 683    these insns (since they're always with 0).  However, conditions.h has
 684    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 685    understandable.  */
 686 #define CC_NO_CARRY CC_NO_OVERFLOW
 687
 688
 689 /* Output assembler code to FILE to increment profiler label # LABELNO
 690    for profiling a function entry.  */
 691
 692 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 693   fprintf (FILE, "/* profiler %d */", (LABELNO))
 694
 695 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 696                                           adjust_insn_length (INSN, LENGTH))
 697
 698 extern const char *avr_device_to_arch (int argc, const char **argv);
 699 extern const char *avr_device_to_data_start (int argc, const char **argv);
 700 extern const char *avr_device_to_startfiles (int argc, const char **argv);
 701 extern const char *avr_device_to_devicelib (int argc, const char **argv);
 702
 703 #define EXTRA_SPEC_FUNCTIONS \
 704   { "device_to_arch", avr_device_to_arch }, \
 705   { "device_to_data_start", avr_device_to_data_start }, \
 706   { "device_to_startfile", avr_device_to_startfiles }, \
 707   { "device_to_devicelib", avr_device_to_devicelib },
 708
 709 #define CPP_SPEC ""
 710
 711 #define CC1_SPEC ""
 712
 713 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 714     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 715     %{!fexceptions:-fno-exceptions}"
 716 /* A C string constant that tells the GCC driver program options to
 717    pass to `cc1plus'.  */
 718
 719 #define ASM_SPEC "%{mmcu=avr25:-mmcu=avr2;mmcu=avr35:-mmcu=avr3;mmcu=avr31:-mmcu=avr3;mmcu=avr51:-mmcu=avr5;\
 720 mmcu=*:-mmcu=%*}"
 721
 722 #define LINK_SPEC "\
 723 %{mrelax:--relax\
 724          %{mpmem-wrap-around:%{mmcu=at90usb8*:--pmem-wrap-around=8k}\
 725                              %{mmcu=atmega16*:--pmem-wrap-around=16k}\
 726                              %{mmcu=atmega32*|\
 727                                mmcu=at90can32*:--pmem-wrap-around=32k}\
 728                              %{mmcu=atmega64*|\
 729                                mmcu=at90can64*|\
 730                                mmcu=at90usb64*:--pmem-wrap-around=64k}}}\
 731 %:device_to_arch(%{mmcu=*:%*})\
 732 %:device_to_data_start(%{mmcu=*:%*})"
 733
 734 #define LIB_SPEC \
 735   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
 736
 737 #define LIBSTDCXX "gcc"
 738 /* No libstdc++ for now.  Empty string doesn't work.  */
 739
 740 #define LIBGCC_SPEC \
 741   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
 742
 743 #define STARTFILE_SPEC "%:device_to_startfile(%{mmcu=*:%*})"
 744
 745 #define ENDFILE_SPEC ""
 746
 747 /* This is the default without any -mmcu=* option (AT90S*).  */
 748 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 749
 750 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 751   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 752
 753 /* Note that the other files fail to use these
 754    in some of the places where they should.  */
 755
 756 #if defined(__STDC__) || defined(ALMOST_STDC)
 757 #define AS2(a,b,c) #a " " #b "," #c
 758 #define AS2C(b,c) " " #b "," #c
 759 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 760 #define AS1(a,b) #a " " #b
 761 #else
 762 #define AS1(a,b) "a     b"
 763 #define AS2(a,b,c) "a   b,c"
 764 #define AS2C(b,c) " b,c"
 765 #define AS3(a,b,c,d) "a b,c,d"
 766 #endif
 767 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 768 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 769 #define CR_TAB "\n\t"
 770
 771 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 772
 773 #define DWARF2_DEBUGGING_INFO 1
 774
 775 #define DWARF2_ADDR_SIZE 4
 776
 777 #define OBJECT_FORMAT_ELF
 778
 779 #define INCOMING_RETURN_ADDR_RTX   avr_incoming_return_addr_rtx ()
 780 #define INCOMING_FRAME_SP_OFFSET   (AVR_3_BYTE_PC ? 3 : 2)
 781
 782 /* The caller's stack pointer value immediately before the call
 783    is one byte below the first argument.  */
 784 #define ARG_POINTER_CFA_OFFSET(FNDECL)  -1
 785
 786 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \
 787   avr_hard_regno_rename_ok (OLD_REG, NEW_REG)
 788
 789 /* A C structure for machine-specific, per-function data.
 790    This is added to the cfun structure.  */
 791 struct GTY(()) machine_function
 792 {
 793   /* 'true' - if current function is a naked function.  */
 794   int is_naked;
 795
 796   /* 'true' - if current function is an interrupt function
 797      as specified by the "interrupt" attribute.  */
 798   int is_interrupt;
 799
 800   /* 'true' - if current function is a signal function
 801      as specified by the "signal" attribute.  */
 802   int is_signal;
 803
 804   /* 'true' - if current function is a 'task' function
 805      as specified by the "OS_task" attribute.  */
 806   int is_OS_task;
 807
 808   /* 'true' - if current function is a 'main' function
 809      as specified by the "OS_main" attribute.  */
 810   int is_OS_main;
 811
 812   /* Current function stack size.  */
 813   int stack_usage;
 814
 815   /* 'true' if a callee might be tail called */
 816   int sibcall_fails;
 817 };